Steam-boiler stay-bolt



(Nd Model.)

0. M. FARRAR.

STEAM BOILER STAY BOLT.

No. 430,181. Patgnted June 17,1890.

Wiin S Inventor. 16M By%WM {(4 MI Jamey UNITED STATES CHILION M. FARRAR, OF BUFFALO, NEW YORK.

STEAM-BOILER STAY-BO LT.

SPECIFICATION forming part of Letters Patent No. 430,181, dated June 17, 1890.

Application filed November 4, 1889. Serial No. 329,192. (No model.)

To all whom it mag concern:

Be it known that I, CHILIoN M. FARRAR, a citizen of the United States, residing in Buffalo, in the county of Erie and State of New York, have invented certain new and useful Improvements in Steam-Boiler Stay-Bolts, of which the following is a specification.

My invention consists in certain improvements in steam-boiler stay-bolts, all of which will be fully and clearly hereinafter described and claimed, reference being had to the accompanying drawings, in which Figure 1 is a side elevation of a stay-bolt, showing a side elevation of a stay-bolt head attached to it. Fig. 2 is a front elevation of the stay-bolt head separate from the staybolt. Fig. 3 is a side elevation of a stay-bolt separate from the head; and Fig. 4 represents a sectional elevation through a portion of a boiler, showing a port-ion of a stay-bolt after it has been entered in its place in the boiler and ready to be riveted in the usual way.

Heretofore a long stay-bolt has always had to be sent to the blacksmith to have a square head or wrench-section put on before it could be used, which operation involves the loss of a portion of the iron and considerable labor.

The object of my invention is to avoid this loss by the use of a removable head, to be a such as I use.

part of the bolt until it is all used up, by which means nearly the whole bolt can be used without much loss and at a great saving of labor.

Stay-bolts for steam-boilers are generally made long enough to make several stay-bolts, a screw-thread being out along their entire length, or nearly so.

In said drawings, 1 represents a stay-bolt The body of the removable head-piece 2 is made hollow to receive the two boxes 3 and 4, which are nicely fitted therein so as to have a movement to or from each other. The opening 5 between the boxes (the opening to receive the bolt) is roughened, substantially as shown, so as to take a better hold of the bolt. It is shown at c, Fig. 2. Back of one of the boxes or side of the box 1 preferably use a wedge-key 6, which, as will be seen, will drive the boxes toward each other when driven in or will allow them to separate when driven out. At the rear of the detachable head or body 2 and forming a portion of it is a square wrench-section 10, to which an ordinary Wrench is applied when screwin the stay-bolt into its place in a boiler.

The operation will be easily understood from the drawings and foregoing description. \Vhen using a stay-bolt, the head-piece is put onto one end and tightened as above described, and when the bolt is all used up the head is easily removed and put onto another bolt.

Any other well-known device may be used for forcing the boxes togetherfor instance, an ordinary set-screw or bolt 7 (shown by dotted lines in Fig. 2)the object being to tighten the boxes together when a stay-bolt is inserted. In Fig. at I have shown two pieces of boiler-plate 8 and 9, in which a stay-bolt has been inserted and out off ready to be riveted in the usual Way. When using these staybolts in this way, a long bolt is used and inserted, as shown in Fig. 4, and then cut off, which operation is repeated until the bolt is used up.

I claim as my invention- 1. The combination, with a stay-bolt for steam-boilers, of a removable head, a means for tightening said head on the bolt, and a wrench-section by which said bolt is turned, substantially as described.

2. A steam -boiler stay-bolt having a removable head provided with a wrench-section at its rear, substantially as described.

3. The combination of a stay-bolt 1, a removable head 2, provided with a wrench-section, boxes 3 and 4 to receive and hold the stay-bolt, and a means, substantially as described, for tightening the head to the bolt, substantially as described.

OHILION M. FARRAR.

Witnesses:

JAMES SANGsTER, GEO. L. LOVEJOY. 

